Creation
Crowley the cat was created by Mark Gruenwald and first appeared as the pet of member Arcanna Jones of the Squadron Supreme #1-The Utopia Principle.
Origin
The character Arcanna, as do the other Squadron Supreme team members, are parallels to the DC Universe characters from the Justice League. As a sorceress she had her very own familiar, which is an animal with magical treats, in her case a grey cat named Crowley. Typically Crowley would stay in the company of Arcanna’s family, Phillip, Drusilla, Andrew and Katrina, to safeguard them and go as a go-between between her and her family when away at missions. She shared a special mystical bond with the Jones family and was able to communicate with them all, although in what manner was never shown.